Monport 40W CO2 Settings for Slate/Stone
Recommended speed, power, and pass settings for slate/stone on the Monport 40W CO2 (40W CO2 laser, 10.6\u03bcm wavelength, 300\u00d7500mm work area). The Monport 40W CO2 is a budget-friendly K40-style CO2 laser that delivers solid cutting and engraving performance at an entry-level price point.
The Monport 40W CO2 is a 40W CO2 laser with a 300\u00d7500mm work area. Slate engraves beautifully with a laser, producing a light grey or white mark against the dark stone surface. Below you will find tested starting parameters for cutting and engraving slate/stone on this machine.
Engraving Settings
| Thickness | Speed (mm/s) | Power (%) | Passes | Notes |
|---|---|---|---|---|
| — | 200 | 30% | 1 | Engrave only -- stone cannot be cut with a hobby laser |
How to Set Up Slate/Stone on the Monport 40W CO2
- 1Secure your slate/stone flat on the work bed using clamps, magnets, or a honeycomb pin set to prevent movement during the job.
- 2Set your focus distance accurately — use the auto-focus probe if your machine has one, or measure manually with the focus gauge.
- 3Ensure your water cooling system is running and the coolant temperature is between 15–25°C before starting the laser.
- 4Enable air assist if available. A steady stream of air at the cut point removes debris, reduces charring, and helps prevent flare-ups.
- 5Enter the speed, power, and pass count from the settings table above into LightBurn. Use the “Cut” or “Engrave” layer settings panel.
- 6Run a small test cut or engrave on a scrap piece of slate/stone before committing to your final project piece. Adjust power up or down by 5–10% based on results.
What to Expect When Lasering Slate/Stone
Engraving slate with a laser removes the dark surface layer to reveal lighter stone underneath, creating a natural-looking white or light grey mark. The contrast is distinctive and permanent. Results vary depending on the specific slate piece — test on each batch. Cutting slate is not possible with hobby-grade lasers.
Common Mistakes to Avoid
- ✗Running at full power on the first attempt — always start with a test piece at the recommended settings and adjust incrementally. Going straight to maximum power risks burning through the material or causing fire.
- ✗Forgetting to check the water cooling system before starting. CO2 laser tubes can overheat and suffer permanent damage if the coolant is not flowing or is above 25°C.
- ✗Expecting perfectly uniform results across the entire piece — natural slate varies in density and composition, so engraving depth and appearance will vary slightly across the surface.
- ✗Skipping the focus calibration step — an out-of-focus beam produces wider, less precise cuts and weaker engravings. Re-check focus every time you change material thickness.
Tips for Slate/Stone on Laser Machines
- ✓Higher power and lower speed produce a whiter, more visible mark on dark slate.
- ✓Clean the slate surface with alcohol before engraving for consistent results.
- ✓Seal the finished piece with a clear coat to protect the engraved design.
- ✓Natural stone varies in hardness and composition -- always test on a scrap piece first.
- ✓Coasters and wall art are the most popular slate laser projects.
Frequently Asked Questions
What speed and power should I use for slate/stone on the Monport 40W CO2?
Can the Monport 40W CO2 cut slate/stone?
Can the Monport 40W CO2 engrave slate/stone?
Other Materials for Monport 40W CO2
Slate/Stone Settings for Other Machines
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